this week, ge is shuttering this plant in winchester, virginia, its last u.s. factory producing plain old incandescent lightbulbs. new energy standards will ought but ban the bulbs. most of which are made overseas. seems the invention that thomoh edison perfected 130 years ago is flickering and fading. >> this is edison's private experimental room at the laboratory. one of the things he was working on a lot in the late 1880s and early 1890s were ways of improving the electric lamp. >> reporter: edison historian paul israel says the great inventor would be torn about the change. >> on the one hand, he would have been disappointed. on the other hand, edison was always somebody kind of looking forward. one of the things he was always very interested in was more efficient ways to generate electricity. so he would have seen that as the future. >> reporter: the incandescent bulb might be edison's most important innovation. notorious for getting by on a few hours' sleep, he wanted to transform the world into a 24-hour culture by lighting up the night. but the old inca